IEECAS OpenIR  > 黄土与第四纪地质国家重点实验室(2010~)
Observational Characteristics of Cloud Radiative Effects over Three Arid Regions in the Northern Hemisphere
Li, Jiandong1,2; Wang, Tianhe3; Habib, Ammara1
AbstractCloud-radiation processes play an important role in regional energy budgets and surface temperature changes over arid regions. Cloud radiative effects (CREs) are used to quantitatively measure the aforementioned climatic role. This study investigates the characteristics of CREs and their temporal variations over three arid regions in central Asia (CA), East Asia (EA), and North America (NA), based on recent satellite datasets. Our results show that the annual mean shortwave (SW) and net CREs (SWCRE and NCRE) over the three arid regions are weaker than those in the same latitudinal zone of the Northern Hemisphere. In most cold months (November-March), the longwave (LW) CRE is stronger than the SWCRE over the three arid regions, leading to a positive NCRE and radiative warming in the regional atmosphere-land surface system. The cold-season mean NCRE at the top of the atmosphere (TOA) averaged over EA is 4.1 W m(-2), with a positive NCRE from November to March, and the intensity and duration of the positive NCRE is larger than that over CA and NA. The CREs over the arid regions of EA exhibit remarkable annual cycles due to the influence of the monsoon in the south. The TOA LWCRE over arid regions is closely related to the high-cloud fraction, and the SWCRE relates well to the total cloud fraction. In addition, the relationship between the SWCRE and the low-cloud fraction is good over NA because of the considerable occurrence of low cloud. Further results show that the interannual variation of TOA CREs is small over the arid regions of CA and EA, but their surface LWCREs show certain decreasing trends that correspond well to their decreasing total cloud fraction. It is suggested that combined studies of more observational cloud properties and meteorological elements are needed for indepth understanding of cloud-radiation processes over arid regions of the Northern Hemisphere.
KeywordArid Region Cloud Fraction Cloud Radiative Effects
WOS HeadingsScience & Technology ; Physical Sciences
Indexed BySCI
WOS Research AreaMeteorology & Atmospheric Sciences
WOS SubjectMeteorology & Atmospheric Sciences
WOS IDWOS:000408337200002
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Document Type期刊论文
Affiliation1.Chinese Acad Sci, Inst Atmospher Phys, State Key Lab Numer Modeling Atmospher Sci & Geop, Beijing 100029, Peoples R China
2.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian 710054, Shaanxi, Peoples R China
3.Lanzhou Univ, Coll Atmospher Sci, Minist Educ, Key Lab Semi Arid Climate Change, Lanzhou 730000, Gansu, Peoples R China
Recommended Citation
GB/T 7714
Li, Jiandong,Wang, Tianhe,Habib, Ammara. Observational Characteristics of Cloud Radiative Effects over Three Arid Regions in the Northern Hemisphere[J]. JOURNAL OF METEOROLOGICAL RESEARCH,2017,31(4):654-664.
APA Li, Jiandong,Wang, Tianhe,&Habib, Ammara.(2017).Observational Characteristics of Cloud Radiative Effects over Three Arid Regions in the Northern Hemisphere.JOURNAL OF METEOROLOGICAL RESEARCH,31(4),654-664.
MLA Li, Jiandong,et al."Observational Characteristics of Cloud Radiative Effects over Three Arid Regions in the Northern Hemisphere".JOURNAL OF METEOROLOGICAL RESEARCH 31.4(2017):654-664.
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